overnight look for lows of 23, santa rosa. 21, napa. 23, livermore. 24, morgan hill. some of the colder locations right around the bay will see lows mainly in the upper 20s. at freezing or below in some coastal locations. then tomorrow, under mainly sunny skies in the afternoon. we'll see high temperatures in the south bay right around 50 degrees. 50 in san jose. 49, santa clara. on the peninsula most highs around 50 also from san mateo to pail l palo alto, mountain view. in and around san francisco, highs in the upper 40s. close to the coast, about 50. up in the north bay, the inland valleys will see highs in the low 50s. 52 in santa rosa. 52 at napa. he's bay highs, 49 at union city and fremont. inland east bay chillier than that. high temperatures will reach only into the upper 40s. all of the inland east bay locations, 48 at livermore,le pleasantton. temperatures moderate a little on wednesday and thursday. by the end of the week high temperatures back in the upper 50s which will seem almost like a heat wave compared to what we have now. a slight chance of some li